74F191SJX(2007) 查看數據表（PDF） - Fairchild Semiconductor

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74F191SJX
(Rev.:2007)

Up/Down Binary Counter with Preset and Ripple Clock

Fairchild Semiconductor 

April 2007

74F191

tm

Up/Down Binary Counter with Preset and Ripple Clock

Features

■ High-Speed—125MHz typical count frequency

■ Synchronous counting

■ Asynchronous parallel load

■ Cascadable

General Description

The 74F191 is a reversible modulo-16 binary counter

featuring synchronous counting and asynchronous pre-

setting. The preset feature allows the 74F191 to be used

in programmable dividers. The Count Enable input, the

Terminal Count output and Ripple Clock output make

possible a variety of methods of implementing multistage

counters. In the counting modes, state changes are initi-

ated by the rising edge of the clock.

Ordering Information

Order

Number

74F191SC

74F191SJ

74F191PC

Package

Number

M16A

M16D

N16E

Package Description

16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow

16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide

Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering number.

Logic Symbols

Connection Diagram

IEEE/IEC

©1988 Fairchild Semiconductor Corporation

74F191 Rev. 1.0.2

www.fairchildsemi.com

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